Quercetin is a compound found in onions and some other fruits and veggies and it is anti-inflammatory and great for helping clear out mucous that is starting to accumulate in the chest. My son and I are both prone to getting bronchitis out of a cold, and he has issues with mucous gradually traveling down toward his chest during allergy season too because he sniffles a lot and everything drains down his throat and eventually finds its way into his bronchial tubes. Take a quercetin capsule 2 to 3 times a day. They are usually ~ 250 mg and you should notice an improvement in your symptoms the same day you start taking them, but it may take a few days or even a couple weeks of this regimen to eliminate the problem, depending on how bad it was when you started. You can find it at just about any health food store and online. The powder in the capsules is yellow, and quercetin is often packaged as a complex with bromelain, a compound in pineapples, with similar anti-inflammatory properties, and also with vitamin C.